Mnesarchella stellae is a species of primitive moths in the family Mnesarchaeidae.

This species is endemic to New Zealand and can only be found in the Nelson area for recording specimen localities as described by T. K. Crosby.

This species prefers very damp, dark native beech forest with plentiful moss and lives at altitudes of between 420 and 750 m. Adults of this species are on the wing in December and January.

There are genitalia differences but in other respects this species is similar in appearance to its close relatives within the genus Mnesarchella.

[2] It can only be found in the Nelson area as described by T. K. Crosby et al. for recording specimen localities.